Effect of Foliar Spray of Ascorbic Acid, Zinc, Seaweed Extracts and Biofertilizer (EM1) on Growth of Almonds (Prunus amygdalus) Seedling

摘要

The study was conducted at the nursery of Malta Station/ Duhok. Kurdistan region-Iraq, on almond ( Prunus Amygdalus) seedlings were sprayed two times during the season 2011 with four levels of ascorbic acid (0, 500, 1000 and 1500 mg.l-1) by using Vitamin C (20 %), and three levels of Zn (0, 15 and 30 mg.l-1) in the form ZnSO4.7H2O, and three levels of seaweed extract (0,1000 and 2000 mg.l-1) by using (sea force), and three levels of Biofertilizer (EM1) (0, 500 and 1000 mg.l-1) to study the effect of ascorbic acid , Zn, seaweed extract (sea force) and Biofertilizer (EM1) on vegetative and root growth of two year old of almonds seedlings, the seedlings were left under nursery conditions till 1 October,2011. Results indicate that foliar application of ascorbic acid at 500 mg.l-1increase significantly primary root length, increasing ascorbic acid to 1000mg.l-1increased plant length, while the foliar application of Zn on 15 and 30 mg.l-1increased significantly chlorophyll %, the application the sea force on 2000mg.l-1increased leaf area average. The application the EM1 on 500mg.l-1increased the lateral shoot average and the increasing the EM1 to 1000mg.l-1increasing significantly leave number , stem diameter, lateral shoot number, leaves dry weight %, shoot dry weight % and root dry weight % when compared with control.